a story of two sisters caught up in the severe weather while paddleboarding adrift at sea for eight hours desperately hanging on in the blistering sun and ABC's Mara schiavocampo has that story for us. Reporter: It started out as a relaxing day in the water. Summer and cayci Underwood setting out but soon a violent storm would turn them into drifters lost at sea for eight harrowing hours. The current got really bad and then we thought this is picking up and there's no way we're going to make it back. Reporter: The 21 and 27-year-old started out off George's tybee island when they say the wind picked up and the water became choppy knocking them off their boards. It turned into waves, very big waves. Reporter: That's when it went from bad to worse. At the peak of the storm, the sisters became separated. With the current the way it was, you know, it was just pushing us further and further apart. Reporter: Thankfully the two eventually found each other but their saga was far from over. For the next eight hours the badly wounded pair would struggle to survive. Their own paddle boards rubbing up and burning their skin with every wave and they say they saw several shrimping boats but nobody saw them. And we just came to realize there was nothing we could do. Reporter: A sink or swim decision. They decided they'd be better off losing their paddleboards and trying to swim back to shore even though they weren't certain where shore was. We couldn't see any sight of land or anything. Reporter: Miraculously the two eventually made it back to dry land. It turns out they had drifted eight miles from their starting point all the way to Hilton head, South Carolina. There were people on the shore but we ended up swimming all the way to them. Reporter: The sisters were treated for shock and exhaustion and say their burns still sting but their bond, they say, grew even stronger. Nobody can compete with the bond that we have now and we've literally fought for our lives together. Reporter: And it was actually the very first time those sisters had tried paddleboarding. One was hospitalized for that chafing from the board and both are at home and say they are completely done with paddleboa paddleboarding understandably and both were wearing life jackets so certainly that helped in their survival. One and done. Yeah if thanks for bringing that to us. Appreciate it. Comeling up, the new bug

This transcript has been automatically generated and may not be 100% accurate.

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